Home / 21,997.47-32,991.12-13,115.31

Finding the Fourth Proportional to 21,997.47, 32,991.12 and 13,115.31

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Solution

The fourth proportional to 21,997.47, 32,991.12 and 13,115.31 is: 19,669.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,997.47 : 32,991.12 = 13,115.31 : x
  2. Step 2: Convert to fraction form
    21,997.47/32,991.12 = 13,115.31/x
  3. Step 3: Cross multiply
    21,997.47x = 32,991.12 × 13,115.31
  4. Step 4: Simplify right side
    21,997.47x = 432,688,766.05
  5. Step 5: Solve for x
    x = 432,688,766.05/21,997.47
  6. Step 6: Final answer
    x = 19,669.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.